Pictures of the day: 4 January 2013

Professor Simon Kay sits with Mark Cahill, who has become the first person in the UK to have a hand transplant. A new technique was used which involved Mr Cahill, from Greetland, near Halifax, West Yorkshire, having his non-functioning right hand removed during the same operation as the donor hand was transplanted. This procedure allowed very accurate restoration of nerve structures and is believed to be the first time this approach has been used.Picture: Leeds General Infirmary/PA